Journal ArticleDOI
Electrical automatic controls for space heating
C.L. Champion,W.P.L. Symonds +1 more
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In this paper, the characteristics of buildings and heating systems affecting the design and selection of automatic controls are discussed, and the principal elements of control systems are described, particular attention being devoted to improvements considered necessary to overcome difficulties in application.Abstract:
Postwar developments in building have increased the importance of automatic controls for heating and air-conditioning installations because of the demand for comfortable environmental conditions and the large potential saving of fuel obtainable with appropriate controls. The reasons why the actual performance of heating controls is often unsatisfactory are considered.The characteristics of buildings and heating systems affecting the design and selection of automatic controls are discussed, and the principal elements of control systems are described, particular attention being devoted to improvements considered necessary to overcome difficulties in application.The application of these elements to typical systems of electrical heating, conventional central heating and air conditioning is then considered, and the paper concludes by discussing the problems of installation and maintenance and demonstrates how these can be alleviated by suitable design procedures.read more
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Journal ArticleDOI
Discontinuous temperature control
W.K. Roots,F. Walker +1 more
TL;DR: In this paper, the performance of a discontinuously controlled electric space-heating process is conveniently characterised by portraying the cycle time, manipulated variable and droop in a cycling-characteristic display.
Journal ArticleDOI
Temperature Control and Electric Heating Bibliography
TL;DR: In this paper, a bibliography of more than 200 references has been selected to provide a background for research and development activities in temperature control and electric heating, and the references are listed in the numerical order in which they relate to the companion paper, "Secondary feedback in ON-OFF Electric Heating Processes."
Improved Control Strategies forElectric Space Heating Processes
TL;DR: In this paper, the authors describe three control strategies for the discontinuous control of electric space heating processes, including ON-OFF controller, derivative feedback controller, and three-position controller with derivative feedback.
Journal ArticleDOI
Improved Control Strategies for Electric Space Heating Processes
TL;DR: Three new control strategies for the discontinuous control of electric space heating processes are described, showing that the magnitude of oscillations and the period of oscillation can be controlled by the designer.